Forget the numerators, focus on the denominators for now. 3 an 4 are both multiples of 12, so we can multiply

by 4 and

by 3 to make all the fractions out of 12. This should make it easier to understand which one is the smallest / biggest.

× 4 = <span>
</span>

× 3 = <span>
</span>
You leave <span>

as it is because it's already out of 12.
Now you can see that obviously, </span>

is the largest fraction, as 9 is the biggest when it's out of 12.

is the second largest as it's 8 out of 12, which is smaller than 9 but bigger than 7. Obviously, the last is one is <span>

.
So the order is:
</span>

,

, <span>

.</span>